Tractor truck



April 1 1924.

J. K. wlcK TRAcToR TRUCK 3 Shets-Sheet 1 Filed Dec. 20. 1921 xvf @FfmALNII tad@ l l I l l llwhnm. A wm 9. u O

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April 1 Y1924.

J. K. WICK TRACTOR TRUCK Filed DeC. 20. 19.21

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@Hou/wig Patented pr. 1, 1924. y

UNITED .STATES JOHN x.' WICK, or OAKLAND, cAmFoRN-.m

TRACTOR TRUCK.

Application led December 20, 1921. Sei'aPNo. 523,632.

To all whom t may concer/n.'

Be it known that I, JoHN K. WICK, a

citizen of the United States, residing at Oakland, in the county ofAlameda and State of California, have invented certaln new anduseful-:Improvements in Tractor4 Trucks, of which the following is aspecifi cation.

My invention is an improved tractor truck, which is strong, durable andhighly efficient, and may be manufactured at a reasonably low cost. y.

Referring to the annexed drawings'ln which my invention is illustratedand whlc form a part of this specification:

Figure 1 is a side elevation of my tractor truck. p l

Figure 2 is a plan -view of' my 'tractor truck.`

Figure 3 is a transverse section of my truck taken on line 3--3 ofFigure Figure 4 is' a transverse section of my In the drawings 1indicates the frame of and 9; angle bar 12 which connects the forwardends of bars 2, 3, 4 and 5; angle bar 13 which connects the forward endsof bars 6, 7, 8 and-9; three Ufshaped bars '14 which are secured to theunder side of the bars 2 and 3; three U-shaped bars 15 which are securedto the under side of the bars 4 and 5';

. three vertical bars 16 which are connectedto the outside of angle bars2 and 6;- three verticalbars 17 which are connected to the'outside ofthebars 5 and 9; supports 18 and 19 upstanding from thebars 7 andrespectvely; supports 20 and 21 depending from t e a blocks 22 arrangedbetween bars 2-and 6, 3

i I and 7, 4 and 8 and 5 .and.9 respectively. Block bearings 25 aresecured in the ang e l 9 res barsv'2 and 6, the an le bars 3 and 7, the

' angle bars 4 and 8, an the angle bars 5 and tively near the rear endof said bars, 1n whichubearingsis seeuredtherear a,xle-26. On said `rearaxle are journaled two rear rockets 27 and 28 between the longitudinaframe .bars 2 and 6 land bars 3 and 7, and between the bars 4 and 8 andbars 5 28 and 35.

rs 3 and 4 respectively; and screw` and 9 respectively'. A worm gear 30is journaled on the axle 2 6 and secured to the inside of sprocket 27between said sprocket.

and the bars 3 and 7. A worm 31 is journaled on the axle 26 and securedto the inside of the sprocket 28 between said sprocket and the bars 4and 8. Block bearings 32 are slidably mounted in the forward portion ofAlongitudinal b ars 2 and 6, bars 3 and 7, bars 4 and 8, and bars- 5 and9 respectively in.

which bearings is secured the front axle 33. A front sprocket 34 is journaled on the front axle lbetween the frame bars 2 and 6 and bars 3and 7. A front sprocket 35'is journaled on the front axle 33 between thelongitudinal frame bars 4 and 8 and bars 5 and 9. The sprockets 27, 28,34 and 35 are disks and are provided with notches 36 in theirperipheries. A traction chain 37 travels over the sprockets 27 and 34and a traction chain 38 travels over the sprockets The links 40 arearched to fit the periphery of the sprockets. Thelinks 40 of said.traction chains are hinged together by hinges 41 which enterthe notches36 as the chains arev driven by said'sprockets.' Ears 42fextend inwardlyfrom'the outside of links 40 and ears 43 extend from said links a shortdistance inwardly from the ears 42, in which lears are journaledrollers44. Ears 45 extend from the inside of the lower reach of the :chains 37and 38 travel over tracks 50 and 51 respectively, there belinks 40 andears 46 extend from said links a loom!!- ing a lon 'tudinal flange 52onthe :lower .surface o each track, pastthe outside and inside of whichtravel the linkears 43 Vand 46 respectively, whereby the rollersemprevented from slidin sidewise oi thetracks.'I4 Links 53 respective yconnect the rearends ofl said vtracks tothe lower ends of the bars' 16and 17 which are nearest the. rear sprockets 28 and 29 respectively.Shanks 54 extend upwardlyl from the forward ends of .the tracks 50 and51 and carry pins 55,011

their upper ends which project outwardly through verticalslots 56 in theforemost bars 16 and 17, the outer ends of said pins beingheaded toprevent them from with-V drawing inwardly out of said slots. Shanks 57three in number extend upwardly from the track 50, the upper portion 58of which shanks being reduced and extending through openings 59 in` thetransverse bars 14, there being shoulders'60 formed on said shanksbetween the .main and reduced portions thereof, which engage the bars 14and limit the upward movement of the track 50 in 2 such position thatthe lower reach of tracthe track v51, the upperv portion 66 of said 47engaging the track. Springs 7l-'Surround Shanks being reduced andextending through openings 67 in the transverse bars 15, there beingshoulders 68 formed on saidl Shanks between the main and reducedportions thereof, which engage the bars 15 and limit the upward movementof the ,track 51 in such position that the lower reach of chain 38extends straight with its rollers 44 and the main portion of theshanks'65 and engage the track 51 and the bars 15, 1so as to force thetrack and chain 38 downwardly when the load on the track is light, butto yield and allow the trackand chainto move upwardly until the chain isstraight-.when the load is heavy. On the top ofthe bars 16 and thesupports 18 is secured a rigid track 72 over which the rollers 44 and 47of the lupper reach of chain 37 travels, said track being formed with anupstanding lon itudinalridge 73, outside and inside of w ich travel saidrollers respectively, whereby the chain is prevented from shiftingsidewise off the track.- yOn the top of bars 17 and supports 19 issecured a rigid track 74 over which travel the rollers 44 and 47 of theupper reach o f the chain 38, said track being formed with an upstandinglongitudinal n lridge 'i' 5 outside and -inside of which respectivelytravel said rollers, whereby the chain is prevented lfrom shiftingsidewise of the track.

A set screw 80 extends forwardly through.

each blockv 22 andl on the forward end of each screw is secured a plate81. Between each plate 81 and its companion bearing `block 32'isinterposed a spring v82 which urges the bearings, .shaft 33 andsprockets 34 andr35 forwardly to take up the slackin the chains 37 and38.

On the forward end of thel truck frame 1 is"'mounted an engine 85, theshaft 86 of which drives two transmission gearings 87 and 88 at the leftand right of the truck respectively. On the shaft 89 of gearing 87 issecured a worm 90. On the shaft 91 of gearing 88 is secured a worm 92. Ashaft 93 extending longitudinally under the tracky 72 and the upperreach of chain 37, is journaled at its forward end in a bracket 94secured on the frame bar 7, and at its forward end in bracket 95alsosecured on said bar. On the rear end of shaft 93 is secured a wormgear 96 which meshes with the worm 90. On the rear end of shaft 93 issecured a worm 97 which meshes with the worm gear 30. A shaft 100extending longitudinally under the track 74 and the upper reach of chain38, is journaled at its rear end in a bracket 101 secured on the framebar 8, and at its forward end in abracket 102 also secured on said bar.On the forward end of shaft 100 is secured a worm gear 103 which mesheswith worm 92. On the rear' end of said shaft is secured a worm 104.which meshes with worm gear 31. The en- 'low 'gine shaft 86 4drives thegearin 87 throu h l a clutch 105 and gearing sha t 106. T e engine shaft86 drives .the gearing 88 through a clutch 107 and gearing shaft 108.

Both clutches 105 and 107 are thrown into operation to drive both chains37 and 38 and the truck straight ahead. 'lo cause the truck to turn tothe right only the clutch 107 is thrown into operation to drive the.chaine 38. To turn to the left only the clutch 105 is thrown intooperation to drive chain 3.7.

v Having described my in ention, I claim:

1. In a tractor truck, a rame, front and rear sprockets on said frame, achain travel-- ing over the vfront and rear sprocket "at each `side ofthe frame, rollers on the links of said chains, cross bars on'said frameprovided with apertures, tracksbetween said front and rear sprockets,over which the rollers on the lower reaches of ,the chains pass, Shankson said tracks, the upper portion of said Shanks being reducedandextending through the apertures inf-l said cross bars, shouldersbetween the main and reduced portion of said Shanks for engagin saidcross bars and .limiting ,the upwar movement of said track in suchposition thaty the lower reaches of the chains will extend straight withits rollers engaging the tracks,

and springs surrounding said Shanks be' tween said tracks and said crossbars for urging said tracks downwardly against the chains.

2. -In a tractor truck, a frame, frontv and rear sprockets on saidframe, a'chain travelin over the front and-rear-s rocket at each sle ofthe frame, ,rollers on chains, cross 'bars on said frame with apertures,tracks between said front and rear sprockets, over 'which the rollers elinks of saidv provided '1 on the lower'reaches of the chains pass,Shanks on said tracks, the upper portion of said Shanks being reducedand extending through ,the apertures in said cross bars, shouldersbetween the main and reduced por` tion of said Shanks for enga ing saidcross bars and limiting the upwar movement of said track in suchposition that the lower reaches of the chains will extend straight withits rollers engaging the tracks, springs surrounding said Shanks betweensaid tracks and said cross bars for urging said tracks downwardlyagainstthe chains, a link connectingl the rear end of each track to theframe, a shank upstanding from the forward end of each track, and a pinon each shank extending through avertical slot in said frame.'

In testimony whereof I affix my signa ture.

JOHN K. WICK.

